Buyer's Tip: Premium quality silicone OptiPad® replacement nose pads for the Oakley Tinfoil sunglasses eyeglass simply snap into each nose pad receptacle on the frame. As the nose pad has a unique symmetrical shape, the nose pad automatically snaps into the correct orientation, however; you do need to make sure that the contoured dome shaped side of the nose pad faces the nose. The opposing flat side of the nose pad faces away from the nose when worn.